<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="css/main.css">
    <script src="js/jquery-1.12.4.min.js"></script>
    <script src="js/main.js"></script>
</head>
<body>
    <div class="mydiv">
        <div><h2>简易计算器</h2></div>
        <div><input type="number" id="input1"><input type="button" value="AC" id="btn"></div>
        <div>
            <ul id="ul1">
                <li>1</li>
                <li>2</li>
                <li>3</li>
                <li>4</li>
                <li>5</li>
                <li>6</li>
                <li>7</li>
                <li>8</li>
                <li>9</li>
            </ul>
            <ul id="ul2">
                <li>+</li>
                <li>-</li>
                <li>*</li>
                <li>/</li>
                <li>c</li>
                <li>=</li>
            </ul>
        </div>
    </div>
</body>
</html>